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1. (WO2017170105) CENTRIFUGAL COMPRESSOR

Pub. No.:    WO/2017/170105    International Application No.:    PCT/JP2017/011661
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Fri Mar 24 00:59:59 CET 2017
IPC: F04D 29/44
F04D 17/12
Applicants: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
三菱重工コンプレッサ株式会社
Inventors: YAMASHITA Shuichi
山下 修一
NAKANIWA Akihiro
中庭 彰宏
SAITO Ryosuke
齋藤 亮祐
TOKUYAMA Shinichiro
得山 伸一郎
Title: CENTRIFUGAL COMPRESSOR
Abstract:
Provided is a centrifugal compressor (1) which is provided with: a rotational shaft (2) which extends in the axial direction (D); a first impeller (3a); a second impeller (3b) which is provided to the downstream side (D2) of the first impeller (3a); a return flow path (30) which guides, inwards in the radial direction, a first fluid (G1) flowing outwards in the radial direction from the first impeller (3a); an introduction flow path (26) which introduces, into the second impeller (3b), the fluid guided inwards in the radial direction; an intermediate suction flow path (10) which additionally supplies a second fluid (G2) to the second impeller (3b); and a bent flow path (27) which is connected to the downstream side of the introduction flow path (26) and the intermediate suction flow path (10), extends so as to bend towards the downstream side (D2), and guides the first and second fluids to the second impeller (3b). The side surface (26a) of the introduction flow path (26) at the upstream side is provided further towards the downstream side (D2) than the turn-back position (R) of the return flow path (30).